Vessel for containing&#39; fluids under pressure



Oct. 10, 1933. Q MULKEY N 1,929,511

VESSEL FOR CONTAINING FLUIDS UNDER PRESSURE Filed Oct. 23, 1931 INVENTOR.

' fiat 19am BY .v w

ATTORNEY.

Patented Oct. 10, 1933 I i VESSEL FOR CONTAINING FLUIDS UNDER PRESSURE Philip 0. Mulkey, Grosse Pointe, Mich. Application October 23, 1931. Serial No. 570,698

' 9 Claims (01. 62-1) This invention relates to improvements in temcation proceeds, the invention is hereinafter more perature equalizing means in vessels containing fully described with the aid of the accompanying gases under pressure during the discharge of drawing, in which: said gases from the said vessels, and refers more Figure -1 illustrates a sectional elevation of a i particularly to equalizing means for use in vesgas container with my temperature equalizing o0 sels containing volatile fluids convertible into means therein; and such gases. Figure 2 is a section on the line 22 of Figure 1.

It is well known that liquefied gases under pres- Referring to the w 1 designates e 8011- sure in most cases, and also some gases under ventional vessel or container intended to hold gas m pressure, vary in temperature in almost direct or liquefied gas under pressure. Its neck 2 is proportion to their pressure, It is al kn wn that internally threaded to receive a suitable valve 3 as these liquefied gases, or gases, are allowed to wh h, i t p s i sta as a r tata escape from their cofitainers their temperature stem 4 t lower t ty Of w c 'rest i it drops so rapidly that aportion of the gases freslot formed transversely of the pp d of a 1 quently freezesinthe containers and forms snow. threaded P h lower extremity of the For instance, in containers placed ithi fire latter normally rests on an annular seat 6 and tinguisher casings to discharge extinguishing Prevents the Passage of gas m t e co tai er 1 compounds therefrom it is found that not only t o t e v ve pe tu e '7 to the ou let 8. The does the last portion of the CO2 freeze therein but p 5 is in threaded engagement W h t body 2o also that a diminution in pressure is noticeable as of the Valve 3 so that as the stem 4 is u d t the as escapes co tl maximum of said plug is rotated and consequently rises from cfiiciency is not obtained from the liquefied gas its seat 6 to permit the passage o as from the by which the compound is to be discharged; and container through t Va ve Outlet 8. again if the container valve is left open after the Within the Container 1 I Provide a p ty g5 container has been supposedly emptied and when of bars othelwise suitably shaped p es of the latter is housed in an extinguisher casing a l These e usually placed s y W hpressure of gas is gradually built up within the in container and are p e ab y s shaped latter by melting of the frozen portion of the gas that when resting against one another their total hich o ti lt n an expldsion heat radiating area is'not materially, reduced.

30 This invention aims to provide means for main- Therefore When using hars'I prefer t th y'b 5 taining a substantially uniform temperature in of Circular Sectioncontainers a th liquefied gas or gas under These bars or pieces of material 9 may be of pressure is allowed to escape therefrom, thereby any desired material having e sufficiently h rev ntin any marked drop in pressure and specific heat and coefficient of heat transmis- 35 also for providing means for utilizing all the ga sion to radiate heat quickly enough to compenin th c tai by l i t of t freezing sate for the loss in temperature that would otherf th l t ti f t gas t t occurs wise occur within the container 1 when the valve Thus, incidentally, the possibility of the gradual 3 is Opened and the gas nces to escape. subsequent discharge of gas from the container I find that y good results y be obta ned 40 above deferred to is also elimi at d, I with aluminum on account of the degree to which Another object of the invention is to provide the above properties-are p s ss d y t is m tal; means for accomplishing the purpose above set and n CO2 is the liquefied gas it is in 110 Way forth wherein material is inserted in the conefieeted y' ehlmihum- Moreover the lighttainers which ha b th rapid h l; transmitting ness of, this metal is another favorable feature 45 property and al o a relatively hi h pecific heat, since the amount of material then necessary does so that heat is given Off by it rapidly enough t not materially increase the weight of the cononset the temperature drop in the containers that tainer Varieus copper alleys, and plain copp r, would otherwise occur as the gas escapes theremay also be satisfactorily-employed for y pu from and during which period there is a tendency P 50 for the pressure of the gas therein to drop, M r Again whatever the crbss sectional form of the over the heat absorbing volum and radi ti material 9care must be taken to provide both area of the material must, of course, be correctly ffiei n he bs r in Vol me and heat radiat proportioned to obtain the desired result. ing surface to compensate for the total amount With these and other objects and advantages of heat loss that would otherwise be sustained 55 inview which will become apparent as the specifiduring the whole period of the gas discharge 1 from the container and at substantially the speed at which that loss would occur.

While in the foregoing the preferred form of my invention and method of utilizing it has been described and shown, it is understood that I may depart in detail therefrom so long as the embodiment falls within the scope of the appended claims.

What I claim as my invention and desire to secure by Letters Patent is:

1. Means for substantially equalizing the temperature of volatile fluid under pressure within a container during its discharge from the latter consisting in the provision of material having a relatively high coehicient of heat transmission placed within said container, said material having suificient mass to absorb enough heat to offset the drop in temperature that would otherwise occur in the fluid remaining in the container as some gasified fluid escapes therefrom, and said material having suflicient heat radiating area to give off its heat quickly enough to prevent any marked drop in temperature of the remaining fluid that would result in a marked drop in the pressure of the remaining fluid.

2. Means for substantially equalizing the temperature of a volatile fluid under pressure within a container during its discharge from the latter consisting in the provision of material of relatively high specific heat placed within said container, said material having sufflcient mass to absorb enough heat to offset the drop in temperature of the remaining fluid that would otherwise occur in the container as some of the gasified fluid escapes therefrom, and said material having sufficient heat radiating surface to give off heat quickly enough to prevent any marked drop in temperature occurring that would result in a marked drop in the pressure of the remaining fluid.

3. Means for substantially equalizing the temperature of liquefied gas under pressure within a container during its discharge from the latter consisting in the provision of a plurality of pieces of material within said container, said pieces having enough mass and a sufiiciently high specific heat to absorb enough heat to pffset any material drop in temperature of the remaining gas that would otherwise result as some gas escapes from the container, and said pieces having enough radiating surface and a sufficiently high coefficient of heat transmission to radiate heat substantially as quickly as the temperature of the remaining gas would otherwise drop as gas escapes from the container.

4. Means for substantially equalizing the temperature of liquefied gas under pressure within a container consisting in the provision of pieces of aluminum within the container having sufflcient heat absorbing mass and heat radiating surface to store enoungh heat and give it off rapidly enough to compensate for the drop in temperature of the remaining gas that would otherwise occur as some gas escapes from the container.

5. Means for substantially equalizing the temperature and pressure of liquefied CO2 under pressure within a container during its discharge therefrom consisting of pieces of material of relatively high specific heat and a relatively high coefficient of heat transmission placed within the container.

6. Means for substantially equalizing the temperature and pressure of liquefied CO2 under pressure within a container during its discharge therefrom consisting of bars of aluminum placed within the container.

7. In a device of the class described, a container adapted to hold fluids under pressure, and a mass of material of a high heat absorbent and radiating character within the container, whereby the temperature of the fluid will remain substantially uniform during its discharge from the container.

8. In a device of the class described, a container adapted to hold fluids under pressure, and a mass of metallic material of a relatively high heat absorbent and radiating character within the container, whereby the temperature of the fluid will remain substantially uniform during its discharge from the container.

9. In a device of the class described, a container, a volatile fluid within said container, and a mass of material of a high heat absorbent and radiating character within the container, whereby the temperature of the fluid will remain substantially uniform during its discharge from the container.

PHILIP O. MULKEY. 

